未定义类型的使用无效？

我有一个头文件，其中包含以下代码……在我的.c文件中，在main...之前，我有，在main中，我有...代码已经被删除了，所以这就是为什么它看起来没有真正执行任何操作。我的问题是，我得到一个错误“error：在每个案例行和其他地方使用未定义类型‘struct._._test’无效。.h文件包含在..c文件中，以及在.h文件中声明的其他变量。有没有想过我做错了什么？谢谢。



      以下为原文

    I have a header file with the following code in it...
typedef enum
{
testExternalEncoderIrRunning,
testExternalEncoderIrSilent,
testMountedDetectorIrRunningFront,
testMountedDetectorIrRunningRear,
testMountedDetectorIrSilent
}stand_alone_status;

typedef enum
{
FALSE = 0,
TRUE = 1
}boolean;

struct stand_alone_tests
{
int statusCounter;
stand_alone_status testStatus;
boolean testSuccessful;
};
extern struct stand_alone_test standAloneTest;


In my .c file, I have, before main...

struct stand_alone_test standAloneTest;

and in main, I have...



   switch(standAloneTest.testStatus)
   {
    case(stand_alone_status.testMountedDetectorIrRunningFront):
     if(standAloneTest.statusCounter > 1000)
     {
      standAloneTest.testStatus = stand_alone_status.testMountedDetectorIrRunningRear;
      standAloneTest.statusCounter = 0;
     }
     break;
    case(stand_alone_status.testMountedDetectorIrRunningRear):
     if(standAloneTest.statusCounter > 1000)
     {
      standAloneTest.testStatus = stand_alone_status.testMountedDetectorIrSilent;
      standAloneTest.statusCounter = 0;
     }
     break;
    case(stand_alone_status.testMountedDetectorIrSilent):
     if(standAloneTest.statusCounter > 1000)
     {
      standAloneTest.testStatus = stand_alone_status.testMountedDetectorIrRunningFront;
      standAloneTest.statusCounter = 0;
     }
     break;
    default:
     standAloneTest.testStatus = stand_alone_status.testMountedDetectorIrRunningFront;
     standAloneTest.statusCounter = 0;
     break;
   }


The code has been stripped, so that's why it doesn't look like it does anything really.  My issue is, I get an error "error: invalid use of undefined type 'struct stand_alone_test' on each of the case lines and in other places.  The .h file is included in my .c file, and other variables declared in the same .h file work.  Any thoughts on what I'm doing wrong?
Thanks.